@misc{indiciaed73a5eb93680,
  title = {ON CANONICAL CONSTRUCTIONS. II.},
  author = {M Gerstenhaber},
  year = {1956},
  doi = {10.1073/pnas.42.11.881},
  url = {https://pubmed.ncbi.nlm.nih.gov/16589965/},
  note = {Source identifier: 16589965}
}